1. P81 Other disturbances of temperature regulation of newborn

    1. P81.0 Environmental hyperthermia of newborn

    2. P81.8 Other specified disturbances of temperature regulation of newborn

    3. P81.9 Disturbance of temperature regulation of newborn, unspecified

      Inclusion term(s):

      • Fever of newborn NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.